Lubricating oil compositions
AssigneeInfineum USA L.P.
InventorsMalcolm Willars, Peter Sant
Life of this patent
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Abstract
A lubricating oil composition comprising, as a detergent, metal salt of a long chain hydrocarbyl-substituted organic acid, at a concentration of not more than 15 mmol/kg oil.
Claims17
A heavy duty diesel lubricating oil composition comprising, as a detergent, one or more overbased metal salts of long chain hydrocarbyl-substituted organic acids selected from the group consisting of aromatic carboxylic acids, sulfonic acids and phenol derivatives, the total concentration of said metal salts being not more than 15 mmol/kg of the composition, provided that the composition is not an SAE 5 W composition whose base stock comprises less than 10 wt. % non-conventional lubricant.
A lubricating oil composition comprising, as a detergent, one or more overbased metal salts of long chain hydrocarbyl-substituted acids selected from the group consisting of aromatic carboxylic acids or phenol derivatives, the total concentration of said metal salts being not more than 15 mmol/kg of the composition, provided that the composition is not an SAE 5 W composition whose base stock comprises less than 10 wt. % non-conventional lubricant.
Dependencies are inferred from the claim text.